闭环MIMO的容量损失研究

On the capacity loss of closed-loop MIMO

首先建立了闭环MIMO(multiple-input-multiple-output)的系统模型,推导出了闭环MIMO容量损失与反馈信道速率之间的数学关系。通过仿真这个数学关系,得出了在不同信噪比、天线数、中断概率下,容量损失相对于反馈信道速率变化规律的相关结论。这个数学关系和这些结论,为实际的闭环MIMO系统设计提供了一定的基础依据,对综合考虑信噪比、天线数、中断概率、闭环MIMO容量损失和反馈信道速率的系统设计有参考意义。

In the closed-loop MIMO system model, the mathematic formulae between the closed-loop MIMO capacity loss and the feedback channel rate were deduced. Through simulation results, five important conclusions on the relations between the average SNR, antenna number, outage probability, capacity loss and feedback rate were proposed. The conclusions, which are important to system design, provided the instructions to design and tradeoff the overhead of feedback channel and the closed-loop capacity.